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Note 9 - Leases - Balance Sheet Information Related to Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Operating lease $ 42,023 $ 36,060
Operating lease accumulated amortization (14,297) (10,706)
Operating lease right of use asset, net 27,726 25,354
Current portion of lease liabilities 5,940 5,580
Operating lease, operating lease liabilities 22,137 19,965
Operating Lease, Liability, Total 28,077 25,545
Property and equipment, at cost 413,396 434,579
Accumulated depreciation $ (266,340) $ (277,379)
Operating leases (Year) 6 years  
Finance leases (Year) 4 years  
Operating leases 3.44% 3.76%
Finance leases 3.42% 3.80%
Other Accrued Liabilities [Member]    
Finance lease current liabilities $ 661 $ 815
Other Noncurrent Liabilities [Member]    
Finance lease liabilities 1,115 2,453
Other Accrued Liabilities and Other Long-term Liabilities [Member]    
Finance Lease, Liability, Total 1,776 3,268
Assets Held Under Finance Leases [Member]    
Property and equipment, at cost 2,710 3,582
Accumulated depreciation (965) (333)
Finance lease, net $ 1,745 $ 3,249